Heater



FIG. 1 is a front, right and top perspective view of a heater, showing my design.

FIG. 2 is a rear, left and bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view; the right side view being a mirror image thereof;

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a partial enlarged view of an area labeled 8 in FIG. 1 comprising an edge of a net cover.

A right side elevation view of the heater is a mirror image of the left side elevation view thereof as shown in FIG. 5 .

The evenly spaced broken lines in the drawings depict portions of the heater that form no part of the claimed design. The dot dash broken lines denote the boundaries of the detail areas and form no part of the claim. 

CLAIM The ornamental design for a heater, as shown and described. 